- Nonflammable perfluoropolyether-based electrolytes for lithium batteries.
Nonflammable perfluoropolyether-based electrolytes for lithium batteries.
Proceedings of the National Academy of Sciences of the United States of America (2014-02-12)
Dominica H C Wong, Jacob L Thelen, Yanbao Fu, Didier Devaux, Ashish A Pandya, Vincent S Battaglia, Nitash P Balsara, Joseph M DeSimone
PMID24516123
ABSTRACT
The flammability of conventional alkyl carbonate electrolytes hinders the integration of large-scale lithium-ion batteries in transportation and grid storage applications. In this study, we have prepared a unique nonflammable electrolyte composed of low molecular weight perfluoropolyethers and bis(trifluoromethane)sulfonimide lithium salt. These electrolytes exhibit thermal stability beyond 200 °C and a remarkably high transference number of at least 0.91 (more than double that of conventional electrolytes). Li/LiNi1/3Co1/3Mn1/3O2 cells made with this electrolyte show good performance in galvanostatic cycling, confirming their potential as rechargeable lithium batteries with enhanced safety and longevity.
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